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Preparation method of ultrahigh-toughness polystyrene resin

A polystyrene resin and polystyrene technology, applied in the chemical industry, can solve problems such as weak interface ability and product performance impact, and achieve the effects of improved mechanical properties, large market competitiveness, and huge profits

Inactive Publication Date: 2012-07-11
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the simple mixing modification leads to weak interfacial ability of various raw materials, which affects the performance of the product

Method used

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  • Preparation method of ultrahigh-toughness polystyrene resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Polybutadiene rubber particles grafted polystyrene impact modifier was synthesized by graft polymerization technology at 65 °C. The styrene monomer is added drop by drop into the latex system of polybutadiene rubber particles by adopting the feeding method of continuous drop starvation method, and graft polymerization takes place. The feed ratio of polybutadiene to styrene was 70 / 30. The amount of initiator used is 1%, redox system, the oxidizing agent is cumene hydroperoxide (CHP), the reducing agent is ferrous sulfate (FeSO 4 ) and glucose (DX). Under the condition of nitrogen protection, the polymerization reaction continues to end after 4 hours, and the final conversion rate of the reaction reaches more than 90%. Add magnesium sulfate solution to demulsify, and dry to obtain polybutadiene rubber particle grafted polystyrene powder. As an impact modifier for polystyrene resin. A twin-screw extruder is used to blend and extrude high-impact polystyrene, polystyrene ...

Embodiment 2

[0039]Using the same method as in Example 1, the difference is that the feed ratio of the emulsion graft polymerization reaction has been adjusted, polybutadiene and styrene feed ratio are 60 / 40, and the polymerization temperature is 70 ° C. After 4 hours of reaction, The conversion rate reaches more than 90%. During the blending and extrusion process, the weight ratios of high-impact polystyrene, polystyrene and impact modifier graft powder were 30 parts, 46 parts and 24 parts respectively. The extrusion blending temperature was set at 200 °C, the mechanical speed was 70 r / min, and processed into pellets. After being dried in a vacuum oven, it can still be injection molded with an injection molding machine at 200 °C. A polymer resin is obtained.

Embodiment 3

[0041] Using the same method as in Example 1, the difference is that the feed ratio of the emulsion graft polymerization reaction has been adjusted, polybutadiene and styrene feed ratio are 50 / 50, and the polymerization temperature is 70 ° C. After 4 hours of reaction, The conversion rate reaches more than 90%. During the blending and extrusion process, the weight ratios of high-impact polystyrene, polystyrene and impact modifier graft powder were 30 parts, 42 parts and 28 parts respectively. The extrusion blending temperature was set at 200 °C, the mechanical speed was 70 r / min, and processed into pellets. After being dried in a vacuum oven, it can still be injection molded with an injection molding machine at 200 °C. A polymer resin is obtained.

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Abstract

The invention relates to a preparation method of an ultrahigh-toughness polystyrene resin, which belongs to the field of chemical industry. The invention aims to provide the preparation method of the ultrahigh-toughness polystyrene resin, in which a graft polymerization technology is utilized to make a rubber particle surface graft with polystyrene material, and the binding force of the interface between the rubber particle and the polystyrene resin is enhanced so as to make the performance of a product stable and increase the toughness of the product. According to the invention, an emulsion graft polymerization technology is utilized to synthetize butadiene rubber particle grafted polystyrene powder; and in a double-screw extruder, shock resistant modifier powder, high-impact polystyrene and polystyrene are blended and modified to prepare high impact strength polystyrene resin in an extrusion mode. Through the blend modification technology, polybutadiene is grafted with a polystyrene shock resistant modifier to toughen the polystyrene. The high-impact polystyrene is added in order to utilize micron Salimi rubber particles and submicron rubber particles contained in the high-impact polystyrene to effect in a synergizing and toughening manners, the polystyrene is added in order to reinforce, and finally an ultrahigh-toughness polystyrene resin product is obtained.

Description

technical field [0001] The invention belongs to the field of chemical industry. Background technique [0002] Because general-purpose polystyrene is hard and brittle, with low mechanical strength and poor heat resistance, people have carried out modification work, and gradually formed the current high-impact polystyrene (HIPS), which is mainly composed of The two-phase system composed of continuous phase polystyrene and dispersed phase rubber greatly increases the toughness of high impact polystyrene due to the rubber phase component contained in the matrix. Because of its low cost, easy processing and coloring, high rigidity, good dimensional stability, and high gloss, it is a thermoplastic that is widely used, such as packaging materials, disposable products, instruments, household appliances, toys and entertainment products and construction industry, etc. [0003] High-impact polystyrene was invented by Ostromislensky and commercialized in the 1950s. Production methods...

Claims

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Application Information

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IPC IPC(8): C08L25/06C08L51/04C08F279/02C08F2/22B29C47/92B29C48/92
CPCB29C48/40B29C48/92B29C2948/92704B29C2948/92895
Inventor 高光辉张会轩张明耀杨洪雨
Owner CHANGCHUN UNIV OF TECH
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